Heater



FIG. 1 is a front left perspective view of a heater showing our newdesign;

FIG. 2 is a front right perspective view;

FIG. 3 is a left rear perspective view;

FIG. 4 is a right rear perspective view;

FIG. 5 is a front elevation view;

FIG. 6 is a rear elevation view;

FIG. 7 is a right side elevation view;

FIG. 8 is a left side elevation view; and,

FIG. 9 is a top plan view.

In the drawings, the broken lines depict unclaimed subject matter onlyand form no part of the claimed design.

The ornamental design for a heater, as shown and described.